<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>双飞翼布局</title>
  <style>
    .container {
      color: white;
      text-align: center;
      
    }
    .center, .left, .right {
      float: left;
      height: 400px;
    }
    .center {
      width: 100%;
      
    }
    .center-childer {
      background-color: green;
      margin: 0 300px;
      height: 400px;
    }
    .left {
      background-color: blue;
      width: 300px;
      margin-left: -100%;
      /* position: relative;
      left: -300px; */
    }
    .right {
      background-color: black;
      width: 300px;
      margin-left: -300px;
     /*  position: relative;
      right: -300px; */
    }
  </style>
</head>
<body>
  <div class="container">
    <div class="center">
      <div class="center-childer">
        center
      </div>
    </div>
    <div class="left">left</div>
    <div class="right">right</div>
  </div>
</body>
</html>